/Engine/Source/Runtime/Core/Public/Math/Vector.h
See if two normal vectors are nearly orthogonal (perpendicular), meaning the angle between them is close to 90 degrees.
true if vectors are orthogonal (perpendicular), false otherwise.
static bool Orthogonal ( const [TVector](API\Runtime\Core\Math\TVector)< T > & Normal1, const [TVector](API\Runtime\Core\Math\TVector)< T > & Normal2, T OrthogonalCosineThreshold )